1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 23 /* 24 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 28 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 29 /* All Rights Reserved */ 30 31 /* 32 * Portions of this source code were derived from Berkeley 4.3 BSD 33 * under license from the Regents of the University of California. 34 */ 35 36 #pragma ident "%Z%%M% %I% %E% SMI" 37 38 /* 39 * DES encryption library routines 40 */ 41 42 #include "mt.h" 43 #include <unistd.h> 44 #include <fcntl.h> 45 #include <sys/types.h> 46 #include <rpc/des_crypt.h> 47 /* EXPORT DELETE START */ 48 #ifdef sun 49 #include <sys/ioctl.h> 50 #include <sys/des.h> 51 #define getdesfd() (open("/dev/des", 0, 0)) 52 #else 53 #include <des/des.h> 54 #endif 55 /* EXPORT DELETE END */ 56 #include <rpc/rpc.h> 57 /* EXPORT DELETE START */ 58 59 extern int __des_crypt(char *, unsigned, struct desparams *); 60 61 static int common_crypt(char *, char *, unsigned, unsigned, struct desparams *); 62 63 /* 64 * To see if chip is installed 65 */ 66 #define UNOPENED (-2) 67 static int g_desfd = UNOPENED; 68 69 70 /* 71 * Copy 8 bytes 72 */ 73 #define COPY8(src, dst) { \ 74 char *a = (char *)dst; \ 75 char *b = (char *)src; \ 76 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 77 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 78 } 79 80 /* 81 * Copy multiple of 8 bytes 82 */ 83 #define DESCOPY(src, dst, len) { \ 84 char *a = (char *)dst; \ 85 char *b = (char *)src; \ 86 int i; \ 87 for (i = (int)len; i > 0; i -= 8) { \ 88 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 89 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 90 } \ 91 } 92 /* EXPORT DELETE END */ 93 94 /* 95 * CBC mode encryption 96 */ 97 int 98 cbc_crypt(char *key, char *buf, size_t len, unsigned int mode, char *ivec) 99 { 100 /* EXPORT DELETE START */ 101 int err; 102 struct desparams dp; 103 104 dp.des_mode = CBC; 105 COPY8(ivec, dp.des_ivec); 106 err = common_crypt(key, buf, len, mode, &dp); 107 COPY8(dp.des_ivec, ivec); 108 return (err); 109 #if 0 110 /* EXPORT DELETE END */ 111 return (DESERR_HWERROR); 112 /* EXPORT DELETE START */ 113 #endif 114 /* EXPORT DELETE END */ 115 } 116 117 118 /* 119 * ECB mode encryption 120 */ 121 int 122 ecb_crypt(char *key, char *buf, size_t len, unsigned int mode) 123 { 124 /* EXPORT DELETE START */ 125 struct desparams dp; 126 127 dp.des_mode = ECB; 128 return (common_crypt(key, buf, len, mode, &dp)); 129 #if 0 130 /* EXPORT DELETE END */ 131 return (DESERR_HWERROR); 132 /* EXPORT DELETE START */ 133 #endif 134 /* EXPORT DELETE END */ 135 } 136 137 138 /* EXPORT DELETE START */ 139 140 /* 141 * Common code to cbc_crypt() & ecb_crypt() 142 */ 143 static int 144 common_crypt(char *key, char *buf, unsigned len, unsigned mode, 145 struct desparams *desp) 146 { 147 int desdev; 148 int res; 149 150 if ((len % 8) != 0 || len > DES_MAXDATA) 151 return (DESERR_BADPARAM); 152 desp->des_dir = 153 ((mode & DES_DIRMASK) == DES_ENCRYPT) ? ENCRYPT : DECRYPT; 154 155 desdev = mode & DES_DEVMASK; 156 COPY8(key, desp->des_key); 157 #ifdef sun 158 if (desdev == DES_HW) { 159 if (g_desfd < 0) { 160 if (g_desfd == -1 || (g_desfd = getdesfd()) < 0) { 161 goto software; /* no hardware device */ 162 } 163 } 164 165 /* 166 * hardware 167 */ 168 desp->des_len = len; 169 if (len <= DES_QUICKLEN) { 170 DESCOPY(buf, desp->des_data, len); 171 res = ioctl(g_desfd, DESIOCQUICK, (char *)desp); 172 DESCOPY(desp->des_data, buf, len); 173 } else { 174 desp->des_buf = (uchar_t *)buf; 175 res = ioctl(g_desfd, DESIOCBLOCK, (char *)desp); 176 } 177 return (res == 0 ? DESERR_NONE : DESERR_HWERROR); 178 } 179 software: 180 #endif 181 /* 182 * software 183 */ 184 if (!__des_crypt(buf, len, desp)) 185 return (DESERR_HWERROR); 186 return (desdev == DES_SW ? DESERR_NONE : DESERR_NOHWDEVICE); 187 } 188 /* EXPORT DELETE END */ 189 190 /* EXPORT DELETE START */ 191 static int 192 desN_crypt(des_block keys[], int keynum, char *buf, unsigned int len, 193 unsigned int mode, char *ivec) 194 { 195 unsigned int m = mode & (DES_ENCRYPT | DES_DECRYPT); 196 unsigned int flags = mode & ~(DES_ENCRYPT | DES_DECRYPT); 197 des_block svec, dvec; 198 int i, j, stat; 199 200 if (keynum < 1) 201 return (DESERR_BADPARAM); 202 203 (void) memcpy(svec.c, ivec, sizeof (des_block)); 204 for (i = 0; i < keynum; i++) { 205 j = (mode & DES_DECRYPT) ? keynum - 1 - i : i; 206 stat = cbc_crypt(keys[j].c, buf, len, m | flags, ivec); 207 if (mode & DES_DECRYPT && i == 0) 208 (void) memcpy(dvec.c, ivec, sizeof (des_block)); 209 210 if (DES_FAILED(stat)) 211 return (stat); 212 213 m = (m == DES_ENCRYPT ? DES_DECRYPT : DES_ENCRYPT); 214 215 if ((mode & DES_DECRYPT) || i != keynum - 1 || i%2) 216 (void) memcpy(ivec, svec.c, sizeof (des_block)); 217 } 218 if (keynum % 2 == 0) 219 stat = cbc_crypt(keys[0].c, buf, len, mode, ivec); 220 221 if (mode & DES_DECRYPT) 222 (void) memcpy(ivec, dvec.c, sizeof (des_block)); 223 224 return (stat); 225 } 226 /* EXPORT DELETE END */ 227 228 229 230 int 231 __cbc_triple_crypt(des_block keys[], char *buf, uint_t len, 232 uint_t mode, char *ivec) 233 { 234 /* EXPORT DELETE START */ 235 return (desN_crypt(keys, 3, buf, len, mode, ivec)); 236 #if 0 237 /* EXPORT DELETE END */ 238 return (DESERR_HWERROR); 239 /* EXPORT DELETE START */ 240 #endif 241 /* EXPORT DELETE END */ 242 } 243